US4272135A - Seal for a rolling bearing - Google Patents

Seal for a rolling bearing Download PDF

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Publication number
US4272135A
US4272135A US06/086,335 US8633579A US4272135A US 4272135 A US4272135 A US 4272135A US 8633579 A US8633579 A US 8633579A US 4272135 A US4272135 A US 4272135A
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US
United States
Prior art keywords
annular
seal
axially
radially
spindle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US06/086,335
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English (en)
Inventor
Ronald F. Hamblin
Harry H. Westgate
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SKF UK Ltd
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SKF UK Ltd
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Filing date
Publication date
Application filed by SKF UK Ltd filed Critical SKF UK Ltd
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Publication of US4272135A publication Critical patent/US4272135A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
    • F16J15/3436—Pressing means
    • F16J15/3456—Pressing means without external means for pressing the ring against the face, e.g. slip-ring with a resilient lip
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G39/00—Rollers, e.g. drive rollers, or arrangements thereof incorporated in roller-ways or other types of mechanical conveyors 
    • B65G39/02—Adaptations of individual rollers and supports therefor
    • B65G39/09—Arrangements of bearing or sealing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • F16C13/02—Bearings
    • F16C13/022—Bearings supporting a hollow roll mantle rotating with respect to a yoke or axle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/58—Conveyor systems, e.g. rollers or bearings therefor

Definitions

  • the invention concerns a seal for a rolling bearing.
  • the seal has applications for bearings in a roller for a conveyor belt.
  • Conveyor belts are used in a variety of industries many of which present environments hostile to bearings; for example, the coal mining industry. In such an industry there is a lot of dust which must be prevented from reaching the bearing and damaging it. Consequently a seal is provided outboard of the bearing in order to protect it.
  • An object of the invention is to provide a seal for a rolling bearing which is easy to assemble and relatively cheap to manufacture.
  • the seal has two sheet metal annular members, which are radially spaced apart and form an annular axially extending gap, and a resilient ring bridging the gap.
  • the annular gap is raised away from the roller and any buildup of material, for example, dust, on the roller.
  • the resilient ring is on the inside of the seal, that is adjacent to the bearing, and is arranged to prevent loss of lubricant from the bearing and not to allow foreign particles to get wedged in the gap and cause the seal to jam.
  • the adjacent portions of the two metal annular members defining the annular axially extending gap are preferably flush so that dust and the like is not allowed to build-up and material is allowed to drop straight down.
  • the resilient ring which is attached to one of the metal members is urged into resilient rubbing engagement with the other of the metal members.
  • the rollers are arranged to form a shallow U-shape, with two adjacent rollers lying horizontally and an inclined roller at each end.
  • the invention provides an end shield for the seal to prevent material accumulating on the seal of an inclined roller.
  • FIG. 1 is part of an axial section of a conveyor roller at one end showing a seal mounted between the spindle and end cap;
  • FIG. 2 is part of an axial section of a conveyor roller at one end with a different seal mounted between the spindle and end cap;
  • FIG. 3 is part of an axial section of a conveyor roller at one end with another seal mounted between the spindle and end cap and a baffle mounted on the spindle adjacent to the seal.
  • the conveyor roller shown comprises a shaft or spindle 10, a tube 11 extending co-axially along and around the spindle and an end cap 12 mounted one at each end of the tube.
  • Each end cap 12 is formed from two separately made parts and comprises a sleeve 13 radially spaced from the spindle 10 and an annular flange 14 extending radially outwardly from the sleeve and being fixed, by for example welding, at its radially outer periphery to the tube 11.
  • the sleeves 13 of the two end caps extend from their respective flanges 14 axially inwardly of the tube 11 and towards each other.
  • a rolling bearing 15 in the embodiment shows a ball bearing comprising an outer race ring 16, an inner race ring 17 and a single annular row of balls 18, is secured between the spindle 10 and the sleeve 13 of the end cap 12 and mounts the tube 11 for rotation about the spindle.
  • the sleeve 13 of the end cap 12 provides two annular recesses 19 and 20 in its bore locating two seals 21 and 22 respectively one each side of the rolling bearing 15.
  • Seal 21 is a sheet metal ring snapped into recess 19 on the axially inner side of the bearing 15 and forms a narrow annular sealing gap 23 between its radially inner periphery and the surface of the spindle 10.
  • Seal 22 comprises two sheet metal annular members 24 and 25, annular member 24 surrounding annular member 25, and a sealing element 26.
  • Each annular member 24, 25 comprises an annular disc 27, 28 respectively, a first or radially outer annular portion 29, 30 respectively extending axially from the outer periphery of the disc and a second or radially inner annular portion 31, 32 respectively extending axially in the opposite direction to the first annular portion from the inner periphery of the disc.
  • the first annular portions 29 and 30 of the members 24 and 25 respectively extends in opposite axial directions.
  • First or radially outer annular portion 29 of member 24 is convex in a section plane including the axis and is located in annular recess 20 of end cap 12.
  • Second or radially inner annular portion 32 of member 25 is tubular and is a push-fit onto spindle 10.
  • the first or radially outer annular portion 30 of radially inner member 25 is spaced radially inwardly from and is adjacent to the second or radially inner annular portion 31 of radially outer member 24 and together portions 30 and 31 define an axially extending annular gap 33 between them with their free ends level with each other.
  • the two annular discs 27 and 28 are axially offset and the sealing element 26, which comprises a ring of resiliently deformable material such as rubber or a plastics, is attached to disc 28 on the side opposite to the level free ends extends across and bridges the said annular gap 33 and is in rubbing contact with member 24.
  • Sealing ring 26 is flat in its relaxed state and, by being attached to member 25 having the axially shorter of the two portions 30 and 31 defining the said annular gap 33, it is in firm contact with member 24.
  • inner member 25 with sealing ring 26 is first pushed onto spindle 10 and then outer member 24 is snapped into position in the recess 20 of end cap 12.
  • the rolling bearing 15 is packed with grease and seals 21 and 22 prevent loss of grease from the bearing and entry of foreign particles which might damage the bearing.
  • Seal 22 is particularly useful in dusty conditions such as on a conveyor roller used in a coal mine because it removes the sealing gap from the spindle 10 and allows a certain amount of dust to build up on the spindle before it reaches the said annular gap 33. Dust particles which do enter the said annular gap 33 are prevented passing, by sealing element 26 into the grease and bearing 16.
  • the conveyor roller shown in FIG. 2 is very similar to that shown in FIG. 1 in comprising a spindle 40, an end cap 41, a rolling bearing 42 and a seal 43.
  • End cap 41 is made in one piece and has a sleeve 44 which provides an annular recess 45 in its bore for seal 43.
  • Seal 43 comprises two sheet metal annular member 46 and 47, member 46 surrounding member 47, and a sealing element 48.
  • Member 46 has a radially inner axially extending annular portion 49 and member 47 has a radially outer axially extending annular portion 50, and the two portions 49 and 50 together define an axially extending annular gap 51 between them.
  • sealing element 48 is attached to member 46, extends across and bridges the annular gap 51 and is in rubbing contact with member 47.
  • the feature that the annular sheet metal member to which is attached the sealing element is axially located in a recess is preferred because that member is mounted first and allows the other member to be mounted and adjusted to fit in the same operation.
  • the part of the conveyor roller shown in FIG. 3 comprises a spindle 60, an end cap 61, a rolling bearing 62, a seal 63 and a shield 64.
  • the end cap 61 is made in one piece and has a sleeve 65 having no recesses to locate seal 63.
  • Seal 63 comprises two sheet metal annular members 66 and 67, member 66 surrounding member 67, and a sealing element 68 attached to member 66.
  • Outer member 66 is a push-fit in the bore of the sleeve 65.
  • the two members 66 and 67 provide two axially extending annular portions 69 and 70 respectively defining an annular axially extending gap 71.
  • the shield 64 is mounted on the spindle 60 on the opposite side of the axially outermost seal, that is seal 63, to the bearing 62 and has an annular flange 72 extending radially outwardly past the two portions 69 and 70 of the seal 63 defining the axially extending annular gap 71.
  • Such a shield 64 may prove useful when using a roller having such a seal 63 in dusty conditions since dust particles will initially build-up on the spindle 60 on the axially outer side of the flange 72. Care has to be exercised however in case dust particles are trapped between the seal 63 and shield 64 and are allowed to build-up and reach annular gap 71.
  • the shield 64 is usually made from a heavier gauge of sheet metal than the components 69, 70 of seal 63 and gives the seal 63 protection against damage from impinging material.
  • a sealing element comprising a flat ring 26, 48, 68 which is strained to achieve a firm rubbing contact by the annular discs of the two members being axially offset
  • a sealing element may be formed having a flat annular portion and a conically extending portion. Then the annular discs of the two members can be located on the same plane lying normal to the axis with the sealing element distorted to a flat shape for firm rubbing contact.
  • the seal 22, 43, 63, described and shown has two annular members which are in axial section basically an S or Z shape, the S or Z shape can be more pronounced so that the annular disc extends conically.
  • other basic shapes are possible, for example a C or U shape, with the radially outer and inner annular portions of each member extending in the axial direction and being joined together by an annular disc.
  • nylon flock may be attached to the annular axially extending surface of one of the two annular axially extending portions defining the said annular gap 33, 51, 71 which surface is radially opposed to the other of the two portions. The nylon flock will extend radially and be in rubbing contact with the said other of the two portions defining the gap and prevent the entry of dust particles.
  • All the components of the seal can be made of plastics as well as same being made of sheet metal.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Of Bearings (AREA)
  • Rolling Contact Bearings (AREA)
US06/086,335 1978-10-23 1979-10-19 Seal for a rolling bearing Expired - Lifetime US4272135A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB41569/78 1978-10-23
GB7841569A GB2033493B (en) 1978-10-23 1978-10-23 Bearing seal

Publications (1)

Publication Number Publication Date
US4272135A true US4272135A (en) 1981-06-09

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ID=10500517

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/086,335 Expired - Lifetime US4272135A (en) 1978-10-23 1979-10-19 Seal for a rolling bearing

Country Status (5)

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US (1) US4272135A (it)
CA (1) CA1118808A (it)
DE (1) DE2942480A1 (it)
GB (1) GB2033493B (it)
IT (1) IT1162422B (it)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4373759A (en) * 1979-03-09 1983-02-15 Skf (U.K.) Limited Bearing assemblies for conveyor rollers fitted with end covers
US5025917A (en) * 1989-02-16 1991-06-25 Wyko, Inc. Bearing assembly for conveyors
US5074408A (en) * 1989-02-16 1991-12-24 Wyko, Inc. Bearing assembly for conveyors
US5372230A (en) * 1991-09-25 1994-12-13 Fabrica De Aco Paulista Ltda. Belt conveyor roller
US5890812A (en) * 1995-07-21 1999-04-06 Skf Industrie S.P.A. Rolling contact bearing sealing device
US5944161A (en) * 1994-12-01 1999-08-31 Jvl Industries Pty Ltd End cap assembly for a roller tube of a conveyor roller
US20100181730A1 (en) * 2007-06-18 2010-07-22 Alan James Roddis Bearing seal
US8146733B2 (en) * 2010-07-27 2012-04-03 United States Steel Corporation Idler roll seal
US20170030411A1 (en) * 2015-07-29 2017-02-02 Aktiebolaget Skf Bearing Assembly

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10303125B3 (de) * 2003-01-25 2004-11-11 Artur Küpper GmbH & Co. KG Tragrolle
DE102007014205A1 (de) * 2007-03-24 2008-09-25 Schaeffler Kg Wälzlageranordnung mit einer integrierten Lagerabdichtung

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB460671A (en) * 1934-09-24 1937-02-02 Schweizerische Lokomotiv Shaft packing for rotary compressors
GB513506A (en) * 1938-04-12 1939-10-13 Tage Georg Nyborg Improvements in or relating to dust-excluding means for bearings
US2275307A (en) * 1939-03-08 1942-03-03 Gen Motors Corp Bearing seal
US2600434A (en) * 1950-06-06 1952-06-17 Saywell Associates Sealing device
GB693222A (en) * 1949-07-09 1953-06-24 Charles Henry Whittle Improvements in and relating to sealing devices for bearings
FR1123765A (fr) * 1955-03-17 1956-09-27 Creusot Forges Ateliers Machine tournante comportant un joint d'étanchéité entre deux parties en mouvement relatif
US2888304A (en) * 1954-11-18 1959-05-26 Hoover Ball & Bearing Co Seal construction for anti-friction bearing
US3097896A (en) * 1959-06-10 1963-07-16 Wasley Products Inc Bearing seal
GB996057A (en) * 1960-07-05 1965-06-23 Jovan Utvitch Sealing joints

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB460671A (en) * 1934-09-24 1937-02-02 Schweizerische Lokomotiv Shaft packing for rotary compressors
GB513506A (en) * 1938-04-12 1939-10-13 Tage Georg Nyborg Improvements in or relating to dust-excluding means for bearings
US2275307A (en) * 1939-03-08 1942-03-03 Gen Motors Corp Bearing seal
GB693222A (en) * 1949-07-09 1953-06-24 Charles Henry Whittle Improvements in and relating to sealing devices for bearings
US2600434A (en) * 1950-06-06 1952-06-17 Saywell Associates Sealing device
US2888304A (en) * 1954-11-18 1959-05-26 Hoover Ball & Bearing Co Seal construction for anti-friction bearing
FR1123765A (fr) * 1955-03-17 1956-09-27 Creusot Forges Ateliers Machine tournante comportant un joint d'étanchéité entre deux parties en mouvement relatif
US3097896A (en) * 1959-06-10 1963-07-16 Wasley Products Inc Bearing seal
GB996057A (en) * 1960-07-05 1965-06-23 Jovan Utvitch Sealing joints

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4373759A (en) * 1979-03-09 1983-02-15 Skf (U.K.) Limited Bearing assemblies for conveyor rollers fitted with end covers
US5025917A (en) * 1989-02-16 1991-06-25 Wyko, Inc. Bearing assembly for conveyors
US5046869A (en) * 1989-02-16 1991-09-10 Wyko Incorporated Conveyor bearing assembly
US5074408A (en) * 1989-02-16 1991-12-24 Wyko, Inc. Bearing assembly for conveyors
US5372230A (en) * 1991-09-25 1994-12-13 Fabrica De Aco Paulista Ltda. Belt conveyor roller
US5944161A (en) * 1994-12-01 1999-08-31 Jvl Industries Pty Ltd End cap assembly for a roller tube of a conveyor roller
US5890812A (en) * 1995-07-21 1999-04-06 Skf Industrie S.P.A. Rolling contact bearing sealing device
US20100181730A1 (en) * 2007-06-18 2010-07-22 Alan James Roddis Bearing seal
US8146733B2 (en) * 2010-07-27 2012-04-03 United States Steel Corporation Idler roll seal
US20170030411A1 (en) * 2015-07-29 2017-02-02 Aktiebolaget Skf Bearing Assembly
US10041542B2 (en) * 2015-07-29 2018-08-07 Aktiebolaget Skf Bearing assembly

Also Published As

Publication number Publication date
DE2942480A1 (de) 1980-04-30
CA1118808A (en) 1982-02-23
GB2033493A (en) 1980-05-21
IT1162422B (it) 1987-04-01
IT7950628A0 (it) 1979-10-22
GB2033493B (en) 1982-12-15

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